Planilum Light-Emitting Material

Planilum is billed as a "light-emitting material" that consists of a 0.8 inch thick tile that is composed of four layers of spacial glass, a rare gas and serigraphed phosphors. It should last for about ten years.

The result of over six years of research, the Planilum technology offers specifications that make it the world's first light-emitting material. This marks a true revolution in the ighting industry, as light no longer radiates from a light bulb or any other light source, but from the material itself.

This is a very sfnal material; readers might think about illuminum, a material showcased in Richard Morgan's 2003 novel Altered Carbon:

The walls and ceiling bore an irregular spacing of illuminum tiles whose half-life was clearly almost up, and their feeble radiance had the sole effect of shoveling the gloom into the center of the room.
(Read more about illuminum)

Update 13-Mar-2012: See also the wall-lights from Isaac Asimov's 1953 novel Foundation and Empire.
End update.